pageAccelerator is a very light solution to load web pages faster. It's an agnostic library that uses ajax and pushState to deliver a faster navigation experience.
pjax is a jQuery plugin that uses ajax and pushState to deliver a fast browsing experience with real permalinks, page titles, and a working back button
Sprint.js is a high-performance, lightweight DOM library for modern browsers. Sprint notably shines on bandwidth and resource constrained devices such as phones and tablets.
Sprint has a familiar, jQuery-like chainable API.
It works in all major browsers and IE7+